Kurokawa Onsen is within the area badly affected by two recent large earthquakes in central Kyushu on 4/14 and 4/16.
There have been no casualties in the area,but there has been damage to some Inn buildings and baths and several places have had to close temporarily to assess and repair the damage. Some are reopening as soon as today (4/18) but others ( including Kurokawaso,Nishimura,Yumerindo,Yusai,Ikoi,Yamamizuki, will not open for business until later this week and a few (Ichinoi,San-ai Kogen Hotel,Yamanoyu) do not know when they will reopen. However ,this information is constantly changing and there are still aftershocks which may slow down the repair and recovery process.
Some roads in the prefecture are still blocked and there is congestion on those that are open,public transport to and from Kurokawa is also affected. I`m sorry that I don`t have detailed information on this at the moment,again it is changing day by day.
Please check with the individual ryokan OR Kurokawa Visitor Center (+81-967-44-0076) if you have a booking or are planning on coming to Kurokawa Onsen in the near future. I live in a nearby town and have been able to find this information from a Japanese source on Facebook,but have not been able to visit the area yet myself and my Japanese contact there at Wakaba Inn (which IS open as normal) is busy with the clear up operations there.
It`s been a tough few days, but from the information I have, most of Kurokawa should be bouncing back for business in time for Golden Week as long as there are no further setbacks.